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<h2><a href="closure_goog_net_xhriopool.js.html">xhriopool.js</a></h2>

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<a name="line1"></a>// Copyright 2006 The Closure Library Authors. All Rights Reserved.
<a name="line2"></a>//
<a name="line3"></a>// Licensed under the Apache License, Version 2.0 (the &quot;License&quot;);
<a name="line4"></a>// you may not use this file except in compliance with the License.
<a name="line5"></a>// You may obtain a copy of the License at
<a name="line6"></a>//
<a name="line7"></a>//      http://www.apache.org/licenses/LICENSE-2.0
<a name="line8"></a>//
<a name="line9"></a>// Unless required by applicable law or agreed to in writing, software
<a name="line10"></a>// distributed under the License is distributed on an &quot;AS-IS&quot; BASIS,
<a name="line11"></a>// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
<a name="line12"></a>// See the License for the specific language governing permissions and
<a name="line13"></a>// limitations under the License.
<a name="line14"></a>
<a name="line15"></a>/**
<a name="line16"></a> * @fileoverview Creates a pool of XhrIo objects to use. This allows multiple
<a name="line17"></a> * XhrIo objects to be grouped together and requests will use next available
<a name="line18"></a> * XhrIo object.
<a name="line19"></a> *
<a name="line20"></a> */
<a name="line21"></a>
<a name="line22"></a>goog.provide(&#39;goog.net.XhrIoPool&#39;);
<a name="line23"></a>
<a name="line24"></a>goog.require(&#39;goog.net.XhrIo&#39;);
<a name="line25"></a>goog.require(&#39;goog.structs&#39;);
<a name="line26"></a>goog.require(&#39;goog.structs.PriorityPool&#39;);
<a name="line27"></a>
<a name="line28"></a>
<a name="line29"></a>
<a name="line30"></a>/**
<a name="line31"></a> * A pool of XhrIo objects.
<a name="line32"></a> * @param {goog.structs.Map=} opt_headers Map of default headers to add to every
<a name="line33"></a> *     request.
<a name="line34"></a> * @param {number=} opt_minCount Minimum number of objects (Default: 1).
<a name="line35"></a> * @param {number=} opt_maxCount Maximum number of objects (Default: 10).
<a name="line36"></a> * @constructor
<a name="line37"></a> * @extends {goog.structs.PriorityPool}
<a name="line38"></a> */
<a name="line39"></a>goog.net.XhrIoPool = function(opt_headers, opt_minCount, opt_maxCount) {
<a name="line40"></a>  goog.structs.PriorityPool.call(this, opt_minCount, opt_maxCount);
<a name="line41"></a>
<a name="line42"></a>  /**
<a name="line43"></a>   * Map of default headers to add to every request.
<a name="line44"></a>   * @type {goog.structs.Map|undefined}
<a name="line45"></a>   * @private
<a name="line46"></a>   */
<a name="line47"></a>  this.headers_ = opt_headers;
<a name="line48"></a>};
<a name="line49"></a>goog.inherits(goog.net.XhrIoPool, goog.structs.PriorityPool);
<a name="line50"></a>
<a name="line51"></a>
<a name="line52"></a>/**
<a name="line53"></a> * Creates an instance of an XhrIo object to use in the pool.
<a name="line54"></a> * @return {goog.net.XhrIo} The created object.
<a name="line55"></a> * @override
<a name="line56"></a> */
<a name="line57"></a>goog.net.XhrIoPool.prototype.createObject = function() {
<a name="line58"></a>  var xhrIo = new goog.net.XhrIo();
<a name="line59"></a>  var headers = this.headers_;
<a name="line60"></a>  if (headers) {
<a name="line61"></a>    goog.structs.forEach(headers, function(value, key) {
<a name="line62"></a>      xhrIo.headers.set(key, value);
<a name="line63"></a>    });
<a name="line64"></a>  }
<a name="line65"></a>  return xhrIo;
<a name="line66"></a>};
<a name="line67"></a>
<a name="line68"></a>
<a name="line69"></a>/**
<a name="line70"></a> * Determine if an object has become unusable and should not be used.
<a name="line71"></a> * @param {Object} obj The object to test.
<a name="line72"></a> * @return {boolean} Whether the object can be reused, which is true if the
<a name="line73"></a> *     object is not disposed and not active.
<a name="line74"></a> * @override
<a name="line75"></a> */
<a name="line76"></a>goog.net.XhrIoPool.prototype.objectCanBeReused = function(obj) {
<a name="line77"></a>  // An active XhrIo object should never be used.
<a name="line78"></a>  var xhr = /** @type {goog.net.XhrIo} */ (obj);
<a name="line79"></a>  return !xhr.isDisposed() &amp;&amp; !xhr.isActive();
<a name="line80"></a>};
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